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Freebase(0.00 / 0 votes)Rate this definition: Stereopsis is the impression of depth that is perceived when a scene is viewed with both eyes by someone with normal binocular vision. Binocular viewing of a scene creates two slightly different images of the scene in the two eyes due to the eyes' different positions on the head.
(4) Stereo depth perception in far vision: The relative difficulty of each of the nine steps in this series is determined by the angular disparity of the 'key' ring in each group. This level of difficulty is expressed as a percentage of theoretical maximum stereopsis according to the Shepard-Fry formula. Stereopsis depends on combining the images received by each eye into one image. The recognition of the relative distances between oneself and different objects, with ability to orient one's position in relation to them, is the basis of depth perception. .